ThermoHide™ Click Here to download a PDF brief. Brisk and rapid rubbing of the indicia areas reveals a hidden valid or alert message and verifies authenticity. Additionally, the heat from a color copier will normally activate the hidden alert message; causing the accepting party to read the warning message. The activated message reverts back to its original camouflaged state upon cooling. Documents at Normal Room Temperature 74° Fahrenheit Documents Fully Activated at 100° Fahrenheit
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